Action composition to enable Cors from your Play API.

gistfile1.java

package controllers;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

import play.mvc.Action;
import play.mvc.Http.Response;
import play.mvc.With;
import play.mvc.Http.Context;
import play.mvc.Result;

public class CorsConstraints {

  /**
	 * Wraps the annotated action in an <code>CorsAction</code>.
	 */
	@With(CorsAction.class)
	@Target({ ElementType.TYPE, ElementType.METHOD })
	@Retention(RetentionPolicy.RUNTIME)
	public @interface Cors {
		String value() default "*";
	}
	
	public static class CorsAction extends Action<Cors> {
		public Result call(Context context) throws Throwable{
			Response response = context.response();
			response.setHeader("Access-Control-Allow-Origin",configuration.value());
			
			//Handle preflight requests
			if(context.request().method().equals("OPTIONS")) {
				response.setHeader("Access-Control-Allow-Methods", "POST");
			    response.setHeader("Access-Control-Max-Age", "3600");
				response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");

				return ok();
			}
			
			response.setHeader("Access-Control-Allow-Headers","X-Requested-With");
			return delegate.call(context);
	    }	
	}
}